42044042 has 4 divisors (see below), whose sum is σ = 63066066. Its totient is φ = 21022020.

The previous prime is 42043993. The next prime is 42044047. The reversal of 42044042 is 24044024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38800441 + 3243601 = 6229^2 + 1801^2 .

It is not an unprimeable number, because it can be changed into a prime (42044047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511009 + ... + 10511012.

Almost surely, 2^42044042 is an apocalyptic number.

42044042 is a deficient number, since it is larger than the sum of its proper divisors (21022024).

42044042 is a wasteful number, since it uses less digits than its factorization.

42044042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21022023.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42044042 is about 6484.1377221648. The cubic root of 42044042 is about 347.7241229690.

Adding to 42044042 its reverse (24044024), we get a palindrome (66088066).

The spelling of 42044042 in words is "forty-two million, forty-four thousand, forty-two", and thus it is an eban number.